In situ architecture, function, and evolution of a contractile injection system.
In situ architecture, function, and evolution of a contractile injection system.
复制标题
收缩注入系统的原位结构,功能和演变。
DOI:
10.1126/science.aan7904
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发表时间:
2017-08-18
期刊:
影响因子:
--
通讯作者:
Pilhofer M
中科院分区:
文献类型:
--
作者:
Böck D;Medeiros JM;Tsao HF;Penz T;Weiss GL;Aistleitner K;Horn M;Pilhofer M
Contractile injection systems mediate bacterial cell-cell interactions by a bacteriophage tail-like structure. In contrast to extracellular systems, the type 6 secretion system (T6SS) is defined by intracellular localization and attachment to the cytoplasmic membrane. Here we used cryo-focused ion beam milling, electron cryotomography, and functional assays to study a T6SS in Amoebophilus asiaticus. The in situ architecture revealed three modules including a contractile sheath-tube, a baseplate, and an anchor. All modules showed conformational changes upon firing. Lateral baseplate interactions coordinated T6SSs in hexagonal arrays. The system mediated interactions with host membranes and may participate in phagosome escape. Evolutionary sequence analyses predicted that T6SSs are more widespread than previously thought. Our insights form the basis for understanding T6SS key concepts and exploring T6SS diversity.
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影响因子:
30.3
作者:
Russell AB;Wexler AG;Harding BN;Whitney JC;Bohn AJ;Goo YA;Tran BQ;Barry NA;Zheng H;Peterson SB;Chou S;Gonen T;Goodlett DR;Goodman AL;Mougous JD
通讯作者:
Mougous JD
DOI:
10.1073/pnas.1607966113
发表时间:
2016-09-06
影响因子:
11.1
作者:
Buttner, Carina R.;Wu, Yingzhou;Davidson, Alan R.
通讯作者:
Davidson, Alan R.
影响因子:
3.6
作者:
Rybakova, Daria;Schramm, Peter;Hurst, Mark R. H.
通讯作者:
Hurst, Mark R. H.
DOI:
10.1098/rstb.2015.0021
发表时间:
2015-10-05
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
作者:
Basler M
通讯作者:
Basler M
影响因子:
5.1
作者:
Horn, M;Harzenetter, MD;Wagner, M
通讯作者:
Wagner, M